Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / cpu / mpc83xx / law.c

diff --git a/qemu/roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c b/qemu/roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c
new file mode 100644 (file)
index 0000000..66c88b6
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/cpu/mpc83xx/law.c
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ */
+
+#include <common.h>
+#include <asm/fsl_law.h>
+#include <asm/mmu.h>
+
+int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id)
+{
+       immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
+       law83xx_t *ecm = &immap->sysconf.ddrlaw[0];
+       u64 start_align, law_sz;
+       int law_sz_enc;
+
+       if (start == 0)
+               start_align = 1ull << (LAW_SIZE_2G + 1);
+       else
+               start_align = 1ull << (ffs64(start) - 1);
+       law_sz = min(start_align, sz);
+       law_sz_enc = __ilog2_u64(law_sz) - 1;
+
+       /*
+        * Set up LAWBAR for all of DDR.
+        */
+       ecm->bar = start & 0xfffff000;
+       ecm->ar  = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc));
+       debug("DDR:bar=0x%08x\n", ecm->bar);
+       debug("DDR:ar=0x%08x\n", ecm->ar);
+
+       /* recalculate size based on what was actually covered by the law */
+       law_sz = 1ull << __ilog2_u64(law_sz);
+
+       /* do we still have anything to map */
+       sz = sz - law_sz;
+       if (sz) {
+               start += law_sz;
+
+               start_align = 1ull << (ffs64(start) - 1);
+               law_sz = min(start_align, sz);
+               law_sz_enc = __ilog2_u64(law_sz) - 1;
+               ecm = &immap->sysconf.ddrlaw[1];
+               ecm->bar = start & 0xfffff000;
+               ecm->ar  = (LAWAR_EN | (id << 20) | (LAWAR_SIZE & law_sz_enc));
+               debug("DDR:bar=0x%08x\n", ecm->bar);
+               debug("DDR:ar=0x%08x\n", ecm->ar);
+       } else {
+               return 0;
+       }
+
+       /* do we still have anything to map */
+       sz = sz - law_sz;
+       if (sz)
+               return 1;
+
+       return 0;
+}